2231856 has 60 divisors (see below), whose sum is σ = 6818760. Its totient is φ = 675840.

The previous prime is 2231849. The next prime is 2231857. The reversal of 2231856 is 6581322.

It is a super-3 number, since 3×2231856³ = 33351837476631810048, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 880 + ... + 2288.

It is an arithmetic number, because the mean of its divisors is an integer number (113646).

2^2231856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2231856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3409380).

2231856 is an abundant number, since it is smaller than the sum of its proper divisors (4586904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2231856 is a wasteful number, since it uses less digits than its factorization.

2231856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434 (or 1425 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2231856 is about 1493.9397578216. The cubic root of 2231856 is about 130.6838910146.

It can be divided in two parts, 22 and 31856, that added together give a triangular number (31878 = T₂₅₂).

The spelling of 2231856 in words is "two million, two hundred thirty-one thousand, eight hundred fifty-six".